The Clue Straightened, as hair
The Answer IRONED
The answer "IRONED" fits the clue "Straightened, as hair" because it describes the process of using a flat iron to make hair smooth and straight. Just like ironing clothes removes wrinkles, using a hair iron helps straighten out curls or waves in hair. Both actions involve applying heat to achieve a sleek appearance. Therefore, "IRONED" is a perfect match for the clue.